Find the Domain of the Function F and of Its $$f ( x ) = - 5 \cos ( 9 x )$$

Multiple Choice

Find the domain of the function f and of its inverse function f-1.
- $$f ( x ) = - 5 \cos ( 9 x )$$

A) Domain of $f : \left[ - \frac { 1 } { 9 } , \frac { 1 } { 9 } \right]$
Domain of $\mathrm { f } ^ { - 1 } : ( \infty , \infty )$

B) Domain of $\mathrm { f } : ( \infty , \infty )$
Domain of $f ^ { - 1 } : [ - 5,5 ]$

C) Domain of f: $( \infty , \infty )$
Domain of $f ^ { - 1 } : [ - 9,9 ]$

D) Domain of $\mathrm { f } : ( \infty , \infty )$
Domain of $\mathrm { f } ^ { - 1 } : [ 4,14 ]$